/* UI Updater for Results Table */

/**
 * Erstellt bzw. aktualisiert die Tabelle im DOM anhand der Analyseergebnisse.
 * @param {Array<{ run_id: string, category: string, delta_t: number, timestamp: string, status: string }>} results
 */
export function renderResultsTable(results = []) {
  const section = document.querySelector('#results-section');
  if (!section) return;

  section.innerHTML = '';

  const table = document.createElement('table');
  table.classList.add('viztool__table');

  const thead = document.createElement('thead');
  const headerRow = document.createElement('tr');
  const headers = ['Run ID', 'Category', 'Δt', 'Timestamp', 'Status'];
  headers.forEach(text => {
    const th = document.createElement('th');
    th.textContent = text;
    headerRow.appendChild(th);
  });
  thead.appendChild(headerRow);
  table.appendChild(thead);

  const tbody = document.createElement('tbody');
  results.forEach(item => {
    const tr = document.createElement('tr');

    const tdRun = document.createElement('td');
    tdRun.textContent = item.run_id ?? '';

    const tdCategory = document.createElement('td');
    tdCategory.textContent = item.category ?? '';

    const tdDeltaT = document.createElement('td');
    tdDeltaT.textContent = item.delta_t?.toFixed(3) ?? '';

    const tdTime = document.createElement('td');
    tdTime.textContent = item.timestamp ?? '';

    const tdStatus = document.createElement('td');
    tdStatus.textContent = item.status ?? '';

    tr.append(tdRun, tdCategory, tdDeltaT, tdTime, tdStatus);
    tbody.appendChild(tr);
  });

  table.appendChild(tbody);
  section.appendChild(table);

  highlightNegativeDeltaT(table);
}

/**
 * Hebt Tabellenzeilen hervor, deren Δt < 0 ist.
 * @param {HTMLTableElement} table
 */
export function highlightNegativeDeltaT(table) {
  if (!(table instanceof HTMLTableElement)) return;

  const rows = table.querySelectorAll('tbody tr');
  rows.forEach(row => {
    const deltaCell = row.cells[2];
    const value = parseFloat(deltaCell?.textContent || 0);
    if (!isNaN(value) && value < 0) {
      row.classList.add('viztool__row--negative');
      deltaCell.setAttribute('aria-label', 'negative delta observed');
    }
  });
}